diff options
Diffstat (limited to 'src/devices/bus/archimedes/podule/etherr.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/etherr.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/etherr.cpp b/src/devices/bus/archimedes/podule/etherr.cpp new file mode 100644 index 00000000000..34ab9866149 --- /dev/null +++ b/src/devices/bus/archimedes/podule/etherr.cpp @@ -0,0 +1,126 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + RISC Developments Ethernet Card + + TODO: + - everything, this is skeleton with ROM. + +**********************************************************************/ + +#include "emu.h" +#include "etherr.h" + + +namespace { + +class arc_etherr_device : + public device_t, + public device_archimedes_podule_interface +{ +public: + // construction/destruction + arc_etherr_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + + static constexpr feature_type unemulated_features() { return feature::COMMS; } + +protected: + // device-level overrides + virtual void device_start() override ATTR_COLD; + virtual void device_reset() override ATTR_COLD; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + virtual const tiny_rom_entry *device_rom_region() const override ATTR_COLD; + + // device_archimedes_podule_interface overrides + virtual void ioc_map(address_map &map) override ATTR_COLD; + virtual void memc_map(address_map &map) override ATTR_COLD; + +private: + required_memory_region m_podule_rom; + + u8 m_rom_page; +}; + + +void arc_etherr_device::ioc_map(address_map &map) +{ + map(0x0000, 0x1fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | ((m_rom_page << 11) & 0x1f800)]; })).umask32(0x000000ff); + map(0x0000, 0x0000).lw8(NAME([this](u8 data) { m_rom_page = data; })); +} + +void arc_etherr_device::memc_map(address_map &map) +{ +} + + +//------------------------------------------------- +// ROM( etherr ) +//------------------------------------------------- + +ROM_START( etherr ) + ROM_REGION(0x20000, "podule_rom", 0) + ROM_LOAD("etherr_1.06.rom", 0x0000, 0x20000, CRC(7b214fda) SHA1(a8045e3749fbf24e721e84e57acb68753fa46428)) +ROM_END + +const tiny_rom_entry *arc_etherr_device::device_rom_region() const +{ + return ROM_NAME( etherr ); +} + + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void arc_etherr_device::device_add_mconfig(machine_config &config) +{ + //NQ8005A(config, "edlc", 20_MHz_XTAL); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// arc_etherr_device - constructor +//------------------------------------------------- + +arc_etherr_device::arc_etherr_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ARC_ETHERR, tag, owner, clock) + , device_archimedes_podule_interface(mconfig, *this) + , m_podule_rom(*this, "podule_rom") + , m_rom_page(0) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void arc_etherr_device::device_start() +{ + save_item(NAME(m_rom_page)); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void arc_etherr_device::device_reset() +{ + m_rom_page = 0x00; +} + +} // anonymous namespace + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE_PRIVATE(ARC_ETHERR, device_archimedes_podule_interface, arc_etherr_device, "arc_etherr", "RISC Developments Ethernet Card") |